COMPOSITE. (COMPOSITE FAMILY.) 245 



7. C. lanceolata, Nutt. Stem terete ; leaves rather fleshy, lanceolate or 

 linear-lanceolate, entire, 3-ncrvecl, somewhat glaucous ; the lowest tapering into 

 a long petiole, the upper sessile. Brackish marshes, Georgia, Florida, and west- 

 ward. Aug. and Sept. Stem 3 -5 high. Lowest leaves 1 or more long. 



74. SENECIO, L. GROUNDSEL. BUTTER-WEED. 



Heads many-flowered ; the flowers all tubular and perfect, or with pistillate 

 rays. Scales of the involucre in a single row, often bracted. Receptacle naked 

 or alveolate Achenia not beaked nor winged. Pappus of copious soft hairs. 

 Herbs, with entire or pinnately divided leaves. Heads corymbose. Flowers 

 yellow. Pubescence mostly webby and deciduous. 



* Annual : heads radiate. 



1. S. lobatus, Pers. Smooth; stem furrowed, hollow ; leaves tender, ly- 

 rate-pinnatitid, with rounded toothed lobes ; the earliest orbicular, long-petioled ; 

 rays about 12. Low ground, Florida to North Carolina, and westward. March 

 and April. Stem l-3 high. Lobing of the leaves variable. 



* * Perennial: heads radiate : lowest leaves petioled, undivided ; the others pinnately 

 lobed or toothed ; the uppermost sessile. 



2. S. aureus, L. Smooth, or more or less woolly when young ; stem (2 

 high) slender ; radical leaves long-petioled, round-cordate, crenate; the others 

 lanceolate or oblong-lanceolate, pinnatifid ; rays 8-12; achenia smooth. 

 Mountains of North Carolina. July. 



Var. fastigiatus. Stem stout (2 -3 high), stoloniferous ; petioles of 

 the larger (2' wide) leaves, as also the involucre, densely woolly at the base. 

 River-banks, Florida. 



Var. Balsamitse. Radical leaves spatulate-lanceolate or obovatc ; lower 

 part of the stem often densely woolly ; achenia hairy. Dry open woods in the 

 upper districts. May and June. A polymorphous species. 



3. S. tomentosus, Miclix. Woolly and hoary throughout ; the leaves 

 becoming smoothish ; lowest leaves oblong, crenate, obtuse ; stem-leaves few, 

 scattered, lanceolate, acute, serrate or toothed ; rays 12-15; achenia hairy. 

 Damp soil, Florida to North Carolina. April and May. Stems mostly simple, 

 2 - 3 high. Heads rather large. 



4. S. Elliottii, Torr. & Gray. Smoothish ; leaves chiefly radical, thick, 

 obovate or roundish, crenate, on short w r inged- petioles; those of the stem small, 

 pinnatifld ; heads crowded; rays 9-12; achenia smooth. (S. obovatus, Ell. 

 in part.) Rocky places, West Florida to North Carolina. April and May. 

 Stem 1 high. Radical leaves 2' -3' wide. 



* * * Perennial : heads radiate : leaves all bipinnately dissected. 



5. S. Millefolium, Torr. & Gray. Woolly when young, at length nearly 

 smooth ; stems tufted, corymbose above ; leaves lanceolate, with the divisions 

 linear and toothed, the lowest ones petioled; heads crowded; rays 9 -12. 

 Mountains of North Carolina, Buckley. June. Stems l-2 high. 



21* 



